I am sure you see this as useful, but I honestly can grasp why on earth
one would one to deliberately introduce one more worry. I mean, if I knew
the var would be local, I would name it in a related way, Xl for example.

Then again, this may only be a reflection of my own lack of proficiency. Can
you show me a case in which it would be indispensable to have such a
construct ?|

FRF